497997

Information

• Patent Grant
• 497997

• References
• Source

• Patent Number

  497,997

• Date Filed

  Not available

• Date Issued

  Tuesday, May 23, 1893
  131 years ago

• CPC

  • B23B5/40 - for turning spherical surfaces inside or outside
  • Y10T409/504264 - Cycloidal surface

• US Classifications

  • 409 - Gear cutting, milling, or planing